Initial commit.

tests/movmsk-opt.ispc

@@ -0,0 +1,35 @@
+static float float4(uniform float a, uniform float b, uniform float c, 
+                    uniform float d) {
+    float ret = 0;
+    for (uniform int i = 0; i < programCount; i += 4) {
+        ret = insert(ret, i + 0, a);
+        ret = insert(ret, i + 1, b);
+        ret = insert(ret, i + 2, c);
+        ret = insert(ret, i + 3, d);
+    }
+    return ret;
+}
+
+export uniform int width() { return programCount; }
+
+
+
+export void f_fu(uniform float RET[], uniform float aFOO[], uniform float b) {
+    float a = aFOO[programIndex];
+    uniform int ret = 0;
+
+    float v = float4(1,1,0,0);
+    bool b = (v == 1.);
+    ret = __movmsk(((int)b));
+    RET[programIndex] = ret;
+}
+
+
+// fixme for 16-wide...
+export void result(uniform float RET[]) { 
+    uniform int x = -1234;
+    if (programCount == 4) x = 3;
+    else if (programCount == 8) x = 0x33;
+    else if (programCount == 16) x = 0x3333;
+    RET[programIndex] = x;
+}